In the course of studying Betula luninifera community at Weimin in Fujian Province,the interrelation between the growth rate of B. luminefera and its neighborhood interference index has been analyzed and the relation ...In the course of studying Betula luninifera community at Weimin in Fujian Province,the interrelation between the growth rate of B. luminefera and its neighborhood interference index has been analyzed and the relation of its size,neighborhood interference index and growth rate has been found.The results show that the influence of neighborhood interference index and growth rate has been found.The results show that the influence of neighborhood interference becomes weak gradually among the investigated trees whose breast height diameter is over 10cm.So it is suggested that B. luminifera at Weiming should be forested before the breast diameter reaches 10cm.展开更多
The seedling stage test on 55 open-pollinated families of plus trees of Betula luminifera H. Winkl. from Shaowu, Nanping and Wuping in Fujian Province was carried out in State-owned Forest Farm of Weimin, Shaowu. The ...The seedling stage test on 55 open-pollinated families of plus trees of Betula luminifera H. Winkl. from Shaowu, Nanping and Wuping in Fujian Province was carried out in State-owned Forest Farm of Weimin, Shaowu. The genetic variations of Betula luminifera were studied, based on the investigation of 1-year-old seedling traits from different families. The results showed that there were abundant variations within the Betula luminifera and very significant differences among families in seedling height, diameter and lateral branch. The variations were mainly controlled by genetic factors. According to this analysis, 11 excellent families were tentatively selected, the average genetic gain of height and diameter were 18.72% and 10.44% respectively. The selection effect was very striking. The Shaowu region was probably a superior genetic resource area of Betula luminifera .展开更多
文摘In the course of studying Betula luninifera community at Weimin in Fujian Province,the interrelation between the growth rate of B. luminefera and its neighborhood interference index has been analyzed and the relation of its size,neighborhood interference index and growth rate has been found.The results show that the influence of neighborhood interference index and growth rate has been found.The results show that the influence of neighborhood interference becomes weak gradually among the investigated trees whose breast height diameter is over 10cm.So it is suggested that B. luminifera at Weiming should be forested before the breast diameter reaches 10cm.
文摘The seedling stage test on 55 open-pollinated families of plus trees of Betula luminifera H. Winkl. from Shaowu, Nanping and Wuping in Fujian Province was carried out in State-owned Forest Farm of Weimin, Shaowu. The genetic variations of Betula luminifera were studied, based on the investigation of 1-year-old seedling traits from different families. The results showed that there were abundant variations within the Betula luminifera and very significant differences among families in seedling height, diameter and lateral branch. The variations were mainly controlled by genetic factors. According to this analysis, 11 excellent families were tentatively selected, the average genetic gain of height and diameter were 18.72% and 10.44% respectively. The selection effect was very striking. The Shaowu region was probably a superior genetic resource area of Betula luminifera .
